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    • 4. 发明申请
    • Apparatus and method for measuring coherence sampling quality-factor
    • 用于测量相干采样质量因子的装置和方法
    • US20070154214A1
    • 2007-07-05
    • US11475877
    • 2006-06-28
    • Dar-Zu HsuSan-Liang Lee
    • Dar-Zu HsuSan-Liang Lee
    • H04B10/08H04B17/00
    • H04B10/07953
    • An apparatus and method for measuring a coherence sampling quality-factor (Q-factor) are provided, which are used to monitor quality of an optical signal in an optical network in real time. The quality is evaluated by a Q-factor. A laser diode and a wavelength converter are used in the apparatus to achieve wavelength coherence and amplification of the optical signal. Furthermore, the laser diode and an optical switch are used together to obtain an optical pulse that can be utilized to sample the optical signal. Therefore, after entering into an optoelectronic converter, a baseband signal in the optical signal is reconstructed through the amplification of the optical signal and the coupling of the optical pulse, so as to detect the Q-factor and to monitor the quality of the optical signal.
    • 提供了用于测量相干采样质量因子(Q因子)的装置和方法,其用于实时监测光网络中的光信号的质量。 质量由Q因子评估。 在设备中使用激光二极管和波长转换器来实现光信号的波长相干和放大。 此外,激光二极管和光开关一起使用以获得可用于对光信号进行采样的光脉冲。 因此,在进入光电转换器之后,通过光信号的放大和光脉冲的耦合来重构光信号中的基带信号,以便检测Q因子并监视光信号的质量 。
    • 5. 发明授权
    • Apparatus and method of non-sampling-based Q-factor measuring
    • 基于非抽样的Q因子测量装置和方法
    • US07843564B2
    • 2010-11-30
    • US12191310
    • 2008-08-14
    • San-Liang LeeChun-Liang YangDar-Zu Hsu
    • San-Liang LeeChun-Liang YangDar-Zu Hsu
    • G01J4/00
    • H04L1/20
    • A non-sampling-based Q-factor measuring apparatus and method use a power conversion module to transform the power variation of inputted optical signals in time domain into the variation in other domains, such as optical wavelength, optical polarization and different output ports of optical elements. Taking optical wavelength as an example, different levels of power variation respond different outputs of wavelength variation through the use of a power-to-wavelength conversion module. An optical filter then separates the inputted optical signals with different wavelengths. The power average of a wavelength for its corresponding optical signals is further calculated by a photo detector. Thereby, the information of the power variation for the inputted optical signals at levels 1 and 0 can be obtained, and the Q-factor for the inputted optical signals is easily measured.
    • 基于非采样的Q因子测量装置和方法使用功率转换模块来将时域中输入的光信号的功率变化变换成其他领域的变化,例如光学波长,光学偏振和光学不同的输出端口 元素。 以光波长为例,不同级别的功率变化通过使用功率到波长转换模块来响应波长变化的不同输出。 然后,滤光器将输入的不同波长的光信号分离。 通过光电检测器进一步计算其相应光信号的波长的功率平均值。 因此,可以获得在等级1和0的输入光信号的功率变化的信息,并且容易地测量输入的光信号的Q因子。
    • 6. 发明授权
    • Apparatus and method for measuring coherence sampling quality-factor
    • 用于测量相干采样质量因子的装置和方法
    • US07532818B2
    • 2009-05-12
    • US11475877
    • 2006-06-28
    • Dar-Zu HsuSan-Liang Lee
    • Dar-Zu HsuSan-Liang Lee
    • H04B10/08H04B17/00
    • H04B10/07953
    • An apparatus and method for measuring a coherence sampling quality-factor (Q-factor) are provided, which are used to monitor quality of an optical signal in an optical network in real time. The quality is evaluated by a Q-factor. A laser diode and a wavelength converter are used in the apparatus to achieve wavelength coherence and amplification of the optical signal. Furthermore, the laser diode and an optical switch are used together to obtain an optical pulse that can be utilized to sample the optical signal. Therefore, after entering into an optoelectronic converter, a baseband signal in the optical signal is reconstructed through the amplification of the optical signal and the coupling of the optical pulse, so as to detect the Q-factor and to monitor the quality of the optical signal.
    • 提供了用于测量相干采样质量因子(Q因子)的装置和方法,其用于实时监测光网络中的光信号的质量。 质量由Q因子评估。 在设备中使用激光二极管和波长转换器来实现光信号的波长相干和放大。 此外,激光二极管和光开关一起使用以获得可用于对光信号进行采样的光脉冲。 因此,在进入光电转换器之后,通过光信号的放大和光脉冲的耦合来重构光信号中的基带信号,以便检测Q因子并监视光信号的质量 。
    • 7. 发明申请
    • Apparatus and method of non-sampling-based Q-factor measuring
    • 基于非抽样的Q因子测量装置和方法
    • US20070109533A1
    • 2007-05-17
    • US11323676
    • 2005-12-30
    • San-Liang LeeChun-Liang YangDar-Zu Hsu
    • San-Liang LeeChun-Liang YangDar-Zu Hsu
    • G01N21/00
    • H04L1/20
    • A non-sampling-based Q-factor measuring apparatus and method use a power conversion module to transform the power variation of inputted optical signals in time domain into the variation in other domains, such as optical wavelength, optical polarization and different output ports of optical elements. Taking optical wavelength as an example, different levels of power variation respond different outputs of wavelength variation through the use of a power-to-wavelength conversion module. An optical filter then separates the inputted optical signals with different wavelengths. The power average of a wavelength for its corresponding optical signals is further calculated by a photo detector. Thereby, the information of the power variation for the inputted optical signals at levels 1 and 0 can be obtained, and the Q-factor for the inputted optical signals is easily measured.
    • 基于非采样的Q因子测量装置和方法使用功率转换模块来将时域中输入的光信号的功率变化变换成其他领域的变化,例如光学波长,光学偏振和光学不同的输出端口 元素。 以光波长为例,不同级别的功率变化通过使用功率到波长转换模块来响应波长变化的不同输出。 然后,滤光器将输入的不同波长的光信号分离。 通过光电检测器进一步计算其相应光信号的波长的功率平均值。 因此,可以获得在等级1和0的输入光信号的功率变化的信息,并且容易地测量输入的光信号的Q因子。
    • 8. 发明申请
    • Structure and manufacturing method for single-wavelength and multi-wavelength distributed feedback lasers
    • 单波长和多波长分布反馈激光器的结构和制造方法
    • US20050031009A1
    • 2005-02-10
    • US10636103
    • 2003-08-07
    • San-Liang LeeIng-Fa Jang
    • San-Liang LeeIng-Fa Jang
    • H01S5/00H01S5/12H01S5/40
    • H01S5/12H01S5/0654H01S5/1203H01S5/1209H01S5/4087H01S2301/173H01S2304/00
    • A single-wavelength distributed feedback (DFB) laser structure is provided. The laser structure having two sections includes an active-material layer for generating a laser having a wavelength in a specific range, two cladding layers respectively covering an upper and a bottom sides of the active-material layer for forming a waveguide structure, a phase shift layer having a specific thickness for controlling a difference between Bragg wavelengths of the two sections, a wet-etching stop layer positioned between the active-material layer and the phase shift layer, and a grating layer having a specific period for determining an illuminating wavelength, wherein a difference between the two sections is an existence of the phase shift layer thereon, and the existence of the phase shift layer causes a difference of the effective refractive indices between the two sections so as to generate a fixed difference between Bragg wavelengths of the two sections.
    • 提供单波长分布反馈(DFB)激光器结构。 具有两个部分的激光器结构包括用于产生具有特定范围波长的激光的活性材料层,分别覆盖用于形成波导结构的活性材料层的上侧和下侧的两个包覆层,相移 具有用于控制两个部分的布拉格波长之间的差异的特定厚度的层,位于活性材料层和相移层之间的湿蚀刻停止层以及具有用于确定照明波长的特定周期的光栅层, 其中两部分之间的差异是其上的相移层的存在,并且相移层的存在导致两部分之间的有效折射率差异,以便产生两个部分的布拉格波长之间的固定差异 部分。
    • 10. 发明授权
    • Apparatus and method for monitoring optical signal-to-noise ratio
    • 用于监测光信噪比的装置和方法
    • US07391970B2
    • 2008-06-24
    • US11026352
    • 2004-12-30
    • San-Liang LeeChun-Liang YangPei-Min GongDar-Zu HsuMing-Hsiao YangYun-Lung Chou
    • San-Liang LeeChun-Liang YangPei-Min GongDar-Zu HsuMing-Hsiao YangYun-Lung Chou
    • H04B10/08
    • H04B10/07953H04B10/071H04B10/07957H04J14/02
    • An apparatus and a method for monitoring optical signal-to-noise ratio are provided. It can be applied in dense wavelength-division multiplexed networks to monitor the transmission quality of each optical channel. The apparatus comprises an optical circulator, a tunable optical filter, a dithering signal, a dithered reflector, and two photodiodes. It can be integrated on a single chip. The invention utilizes the dithering and reflection functions of the dithered reflector, and passes the signal and the noise through the tunable optical filter once and twice, respectively. When the tunable optical filter is scanning and filtering the whole spectrum, the signal and noise powers are measured by the two photodiodes, respectively. The OSNR for each optical channel is then calculated according to the signal and noise powers. It can monitor channel location, wavelength drift, and OSNR by including a wavelength locker to act as an optical channel analyzer.
    • 提供了一种用于监测光信噪比的装置和方法。 它可以应用于密集的波分复用网络,以监测每个光通道的传输质量。 该装置包括光循环器,可调光滤波器,抖动信号,抖动反射器和两个光电二极管。 它可以集成在单个芯片上。 本发明利用抖动反射器的抖动和反射功能,并将信号和噪声分别通过可调光滤波器一次和两次传递。 当可调滤光器扫描和滤波整个光谱时,信号和噪声功率分别由两个光电二极管测量。 然后根据信号和噪声功率计算每个光通道的OSNR。 它可以通过包含一个波长锁定器作为光通道分析仪来监视通道位置,波长漂移和OSNR。